President Donald Trump pressed senior aides last June to devise and carry out a campaign to discredit senior FBI officials after learning that those specific employees were likely to be witnesses against him as part of special counsel Robert Mueller’s investigation, according to two people directly familiar with the matter.

Trump attorney John Dowd warned the President that there were inherent risks to his plan to discredit FBI officials.

Since Dowd gave him that information, Trump — as well as his aides, surrogates, and some Republican members of Congress — has engaged in an unprecedented campaign to discredit specific senior bureau officials and the FBI as an institution.

Specifically, Trump has targeted current Deputy Director of the FBI Andrew McCabe and two other senior officials.

The FBI officials Trump has targeted are Andrew McCabe, the current deputy FBI director and who was briefly acting FBI director after Comey’s firing; Jim Rybicki, Comey’s chief of staff and senior counselor; and James Baker, formerly the FBI’s general counsel. Those same three officials were first identified as possible corroborating witnesses for Comey in a June 7 article in Vox. Comey confirmed in congressional testimony the following day that he confided in the three men.